# SDR ASAA2023062343692

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2023
- Submitted: June 27, 2023
- Operation: Air carrier
- Aircraft: [N948AK](https://openairdocs.org/aircraft/N948AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44090
- Aircraft time: 2,795 hours, 807 cycles
- System (JASC): [2420 · AC Generation System](https://openairdocs.org/jasc/2420)
- Part: Module
- Part number: 233A32043
- Part serial: F08562
- Condition: Faulty
- Location: Flight Compartme
- Part time: 2,790 hours, 806 cycles
- Stage of operation: TX
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023062343692

## Discrepancy

SOURCE OFF LIGHT ON GEN 1 SIDE WHEN TRANSFERRING FROM GROUND POWER TO APU GEN. GROUNDED - YES. OMF SHOWS NO FAULTS, GCU & BPCU NO FAULTS, ELECTRICAL PANEL MODULE TEST NO FAULTS AMM 46-13-00, AMM 24-21-00, AMM 24-41-00, AMM 24-31-00, CYCLED A/C POWER WITH NO FIX AMM 24-41-00, TRIED NEW GCU #1 & BPCU NO FIX, RE-INSTALLED BOTH LRUS AMM 24-21-81/401 & AMM 24-41-21/401, ALSO ACCOMPLISHED IFIM 24-21-00-810-809, REPLACED NEW AC SYSTEM GENERATOR & APU MODULE & PERFORMED INSTALLATION TEST GOOD AMM 24-21-51/401.

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